Male logic (or just plain logic) follows a direct path, clearly tying the consequences of action to the actor. Female logic doesn't follow a direct path. Female logic always contains a patsie, something to blame her actions on just in case something goes wrong. This is why whenever a girl screws up, it's never her fault - she's used female logic to cover her ass.

Essentially, female logic is to do whatever you want and then justify it with unrelated bullshit excuses after the fact. It's actually reverse logic.

Male logic applied:

I've got a girlfriend, but I want to sleep with this hot chick. I'll just fuck her then lie if I get caught.

I want to sleep with that guy, but I have a boyfriend. I'll get drunk and flirt with him. That way, if we have sex I can blame it on him or the alcohol (2 patsies) instead of me being a cheating whore.

*Gets caught next day*
"Well it wasn't my fault because he was hitting on me while I was drunk, and I told him you're my boyfriend, but he kept coming on to me. I was too drunk to know what was going on and it just kinda happened..." *crying hysterically*